Volumn up and bracket keys not working?

Hello Guys,

Maybe someone can help with this problem. I have an 820-2330 logic board that has complete functionality except for the volume up button and the bracket keys not working. I switched out a good logic board to make sure the keyboard wasn't the issue, and the keyboard works fine. Is there a particular area on the logic board that can be troubleshot? The keyboard connector on the schematic shows a diagram but it doesn't point me to the exact keys, it just gives numbers except for the power on pin and voltage pins. Any help would be appreciated!


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